Gas flow control
AssigneeHoneywell International Inc.
InventorsGerrit Jan Baarda, Derk Vegter
Life of this patent
Estimating the term…
Abstract
A gas flow controller includes a control valve coupled for actuating a main valve. In one example embodiment, a gas flow controller includes a main valve and a servo valve operated by an actuator, said servo valve being used for controlling the opening of the main valve. The servo valve is implemented in a variety of manners, such as a three-way valve means or as a double two-way valve. The servo valve further communicates, via gas pipes, with a first gas chamber limited by a diaphragm being in operative connection with the main valve, as well as to a second gas chamber in the inlet area, and a third gas chamber in the outlet area.
Claims16
A gas flow controller for gas burners comprising:
- a main valve being operable by means of a diaphragm that delimits a first gas chamber;
- and
- a three-way valve means connected via gas pipes to the first gas chamber, a second gas chamber in the inlet area of the main valve and a third gas chamber in the outlet area of the main valve, the three-way valve means being operated by an actuator and adapted to control gas flow for applying pressure to the diaphragm for actuating the main valve.
A gas flow controller comprising:
- inlet, outlet and auxiliary chambers;
- a main valve coupled between the inlet and outlet chambers and to a diaphragm separating the inlet chamber from the auxiliary chamber, the main valve being controllable in response to movement of the diaphragm;
- and
- a three-way control valve coupled to the inlet, outlet and auxiliary chambers and configured and arranged to control movement of the main valve by controlling differential pressure across the diaphragm.
A gas burner supply valve comprising:
- first, second and third gas chambers, the first and second gas chambers being separated by a diaphragm, the first and third gas chambers being separated by a main valve coupled to the diaphragm, the main valve being configured and arranged for actuating in response to movement of the diaphragm caused by a differential pressure across the diaphragm;
- and
- a three-way servo valve connected via gas pipes to the first, second and third gas chambers and configured and arranged for controlling the differential pressure across the diaphragm to control the actuation of the main valve by selectively coupling the first, second and third gas chambers.
Dependencies are inferred from the claim text.